1 . Don’t _____________(松开) the rope or I will fall into the river. (根据汉语提示完成句子)

2 . Please don’t h________ to contact me if you have any questions. I’m delighted to offer you advice on applying for a scholarship. (根据首字母单词拼写)

3 . Why not ________ ________ (参加……的选拔) for the school football team? (根据汉语提示完成句子)

4 . Don’t h______ (犹豫) to ask me if you have any questions.